Rotary pump.



PATENTED MAY 5, 1903.

A. MAYER. ROTARY PUMP.

nrmoumn rum) 007.9, 1902.

10 MODEL.

ject of the Emperorof Austria-Hungary, re-

UNITED STATES Patented May 5, 190

PATENT GE I AUGUST MAYER, OF BUDAPEST, AUSTRIA-HUNGARY.

. 1 'RQTARY P MP.

SPEGIFIGATIONforming part of rates Patent No. 727,171, dated May 5,1903.

Application filed October 9, 1902.

To all whom, it may concern:

Be it known that I, AUGUST MAYER, a subsiding at Budapest,Austria-Hungary, have invented certain new and useful Improvements inRotary Pumps, (for which l'have applied for Letters Patent in Germanyo'nthe- 28th day ofJauuary, 1901',) of which the following-is aspecification. 1

My invention has for its object to so con-f struct a rotary pump that itwill continuously create a vacuum-chamber on the suction side thereofand concurrently therewith will -forcibly close a corresponding chamberon the discharge side to expel its load of water; and to this end itconsists in the employment of independently-movable sector-pistons inthe cylindrical pump-casing, with mechanism for rotating them andsimultaneously causing them to open away from each other to form insuccession vacuum-chambers and for moving them up against each other toforcibly close said chambers, all as will hereinafter" appear.

In the drawings, Figures 1- to l are diagrammatic representations of thepistons in successive stages of action, Fig. "2 is a ver-' tical sectionthrough the pump transversely to the line of the actuating-shaft. Fig. 3is a vertical section at right angles to the foregoingthat is,coinciding with the axis of i said shaft. Fig. 4 is a section similar toFig. 2, but with the piston in a more advanced stage of action andshowing an alternative mounting of the wrist-pins.

G is the casing of the pump, tightly closed by heads K and J and partlyencircled on one side by the suctionfchan'nel or, opening from thesuction-pipe b, and on the other by the force-channel at, opening intothe force-pipe I). These sector-shaped wing-pistons M, M, and M aremounted upon the conical sleeves or shaft-sections 'L, so as to readilyturn thereon. In each of the wing-pistons is mounted a wrist-pin dd dhaving loose sleeves'e e 6 upon theirprojecting' ends. The drive-shaft Kis fixed to the face-plate O, and both are mounted eccentrically to theaxis of the pumpcylinder. The face-plate has three radialsymmetrically-spaced slots 0 c 0 with which the sleeves of theabove-mentioned wrist-pins Serial No. 126 ,6 18. (No model engage. Theregulating-disk N, through which the sectional shaft L is passed, isadjusted inward by set-screws h h 650., just so far as necessary for thetight closing in of the wing-pistons, without, however, materiallyinterfering with their easy-running. The set-screw t', Fig. 3, servesfor theclosing together of the conical sectionsof shaft L over theroller f, by means of which thewing-pistons are adj u'sted' out againstthe internal p'eriphery of the""p ump -cylinder, an elastic ring orintermediate piece g being interposed between said' sections. Thedriving-shaft is passed througha stuffing-box lm and connectedtherebeyondwith a suitable source of power.

' Instead of' making slots in the face-plate the wrist-pins may bemounted therein and work in slots 0 c o in the respective wingpistons,as represented in Fig. 4., showing such alternative form. The actionwill be the same either way.

Referring to the diagrammatic representation in Fig. l and assuming astarting position, such as shown in Fig. 1 it will be seen" that the twouppermost pistons M M have'po mein contact with each other upon ali'nel'corresponding to a vertical radius from their axis of rotationand registering with the narrow rib n, which divides thesuction-channeljfrom the force-channel at the vertically overhead pointof the pump-cylinder, while the lowermost piston M is separated fromboth, forming two chambers 91 n one opening at the left into thesuction-channel and the other at the right into the force-channel. Asthe eccentric face-plate turns in the direction of thearrow it acts morerapidly upon the wrist-pin d of piston M and moves said piston away frompiston M, as shown in Fig.

1 this representing the opening at the incipient end ofthesuction-channel, and at the same time it begins to olosepiston M upagainst piston M. 'By this means a gradually-widening vacuum-chamber isproduced between pistons M and M, which sucks in water from thesupply-pipe b, while at the same time a gradually-closing force-chamberis effected between pistons M and M to expel water through thedelivery-pipe b. As pistons M and M are carried along thesuction-channe'l, the vacuum-chamber successively reaches the magnitudesshown in Figs. 1 and 1 the latter being its maximum and corresponding tothe moment when it is entirely out off from the suction-channel and alsofrom the force-channel by engagement with cut-0E surface 92 At thisinstant a perpendicular let fall from the axis will bisect the spacebetween the said pistons, as in Fig. 2, and form, with the startingradius in Fig. 1*, a vertical diameter through the machine. Furthermovement of the pistons M and M opens the vacuum-chamber filled withwater from the suction-channel into the force-channel, where itimmediately becomes a force-chamber, since the face-plate 0 now acts toretard the piston M and close the piston M up thereagainst, asrepresented in Figs. 1 and 1 the latter showing the two pistons on thepoint of leaving the forcechamber and approaching the starting-point.(Indicated in Fig. 1.)

It will be understood that the action between piston M and pistons M andM is relatively the same as that above described between pistons M andM, so that, as shown by the diagram, there is at all times avacuum-chamber being opened in the suctionchannel and a force-chamberclosing in the force-channel.

The machine may be reversed and Work in the same way, provided water isintroduced into pipe 1) and allowed to flow out through pipe 1).

It will be observed that the rib it forms a sharp division between theforce-chamber and the suction-chamber of the pistons. On one side theforce-chamber is closing up to the time it reaches it, and the advancingpiston there comes into contact with the lagging piston in front, afterwhich the instant they pass it, or rather pass the vertical diameterwhich bisects it, the lagging piston becomes the hurrying one and thepreviously-hurrying one begins to lag and the suction-chamber commencesto form. Thus the closing of the force-chamber practically culminatesand the opening of the suction-chamber may be said to commence on thevertical diameter of the pump-cylinder. This, in connection with thefact that the lower cut-off surface is or may be raised, gives anextremely large suction-channel and an extremely large forcechannel tothe pump-cylinder and an imporceptible transition from one to the other.After the working contact of the pistons against the casing has beenclosed by the conical sleeves and the lateral contact also closed by theadjusting-plate N the contact of the pistons at the crown leaves no deadroom, and therefore the suction of the pump approaches very near-acomplete vacuum, and since this suction is not periodically broken, butacts continuously, the exhaust acts accurately at the greatestpermissible depths and without necessity of a foot-valve in thesuction-pipe or of priming. The pump also works with entire absence ofshock and thumping and without the use of air-chambers.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination, in a rotary pump, of a series of sector-formedwing-pistons, a cylinder in which they work, suction and dischargechannels partly surrounding and opening into said cylinder on oppositesides thereof, an eccentric face-plate, wrist-pins connecting thepistons with said face-plate, and having a radial sliding movementrelatively to one of said members, whereby said pistons are driven atvarying speed, to open away from each other in the suction-channel andclose toward each other in the discharge-channel, a cut-off rib betweensaid channels at the point of complete closing, and a cut-off surfacebetween said channels at the point of maximum opening.

2. The combination, in a rotary pump, a series of sector-formedring-pistons, a cylinder in which they work, suction and dischargechannels partly surrounding and opening into said cylinder on oppositesides thereof, an eccentric face-plate, wrist-pins connecting the pistonwith said face-plate and having a radial sliding movement relatively toone of said members, whereby said pistons are driven at varying speed,to open away from each other in the suction-channel and close towardeach other in the dischargechannel, a narrow cut-off rib between saidchannels at the point of complete closing and a raised'cut-off surfacebetween said channels at the point of maximum opening, and correspondingin extent therewith and the center line of which is diametricallyopposite the center line of said rib.

3. The combination, in a rotary pump, of a series of sector-formedwing-pistons, a cylinder in which they work, means for rotating them atvariable speeds, a sectional shaft composed of two cone-shaped sleevesupon which they rotate, means for adjusting said sleeves toward eachother to force the pistons out against the cylinder, suction anddischarge passages on opposite sides of said cylinder and cut-offsbetween said passages.

4. The combination, in a rotary pump, of a series of sector-formedwing-pistons, a cylinder with suction and discharge passages, in

which they work, cut-offs between said passages, means for rotating saidpistons at relatively varying speeds, a sectional shaft com posed oftwo'converging cones mounted upon a bolt or roller, supporting saidsections as they rot-ate, a movable plate in one side of the cylinderthrough which plate the corresponding outer end of said shaft passes,and means for adjusting said plate up against the pistons.

5. The combination, in a rotary pump, of a series of sector-formedwing-pistons, a cylinplate in one side of the cylinder and means :0 derwith suction and discharge passages in for setting it in toward saidpistons.

which they work, cut-offs between said pas- In testimony whereof I affixmy signature sages, means for rotating said pistons at relain presenceof two witnesses. 5 tively varying speeds, a sectional shaft com- AUGUSTM AYER posed of two conical sleeves and an inclosed bolt or roller uponwhich they rotate, means Witnesses: I

for setting said sleeves up toward each other BERNARD G. ELLIOT, toadjust the pistons against the cylinder, a LOUIS VAINLOVE.

